Re: What is a week?

[Max Nikulin]

On 10/04/2023 14:46, Ihor Radchenko wrote:
> 0bca49801eac749b6adf39b176b9455566faac85
> Author:     Bastien Guerry
> org-clock.el: Implement a new parameter :wstart to define the week start day
>
> -      (setq diff (+ (* -7 shift) (if (= dow 0) 6 (1- dow)))
> +      (setq diff (+ (* -7 shift) (if (= dow 0) (- 7 ws) (- dow ws)))
>
> I am not sure if there is any particular reason.

https://list.orgmode.org/87y4z481yc.fsf@bzg.ath.cx/
Bastien. Re: Clocktable for this week starting at Sunday. Thu, 17 Apr 
2014 16:28:43 +0200
> Torben Hoffmann writes:
>
> >     #+BEGIN: clocktable :maxlevel 2 :scope agenda-with-archives
> >      :weekstart 7 :block thisweek :step day :fileskip0 :narrow 20!
>        ^^^^^^^^^^
>
> should be :wstart -- let us know if it works!

So at least some people expect 7, not 0. I would say, both variants 
should be acceptable.

P.S. It seems, there is no way to get in Emacs first_weekday from locale(5)